/*
 * Copyright 2023 devaper
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.github.devaper.pigeon.support

import io.github.devaper.pigeon.response.*
import java.util.concurrent.*

/**
 * 立即响应的Deferred, 一般用于fallback中响应数据使用
 */
class ImmediateDeferred<T>(
    private val data: T? = null,
    private val throwable: Throwable? = null
) : Deferred<T> {

    override fun get(): T {
        return getWithTimeout(0, TimeUnit.MILLISECONDS)
    }

    @Suppress("unchecked_cast")
    override fun getWithTimeout(timeout: Long, unit: TimeUnit): T {
        if (throwable != null) {
            throw throwable
        }
        return data as T
    }
}